<template>
  <div :class="{ hidden: hidden }" class="pagination-container">
    <el-pagination v-model:current-page="currentPage" v-model:page-size="pageSize" :background="background" :layout="layout" :page-sizes="pageSizes" :pager-count="pagerCount" :total="total" @sizeChange="handleSizeChange" @currentChange="handleCurrentChange" />
  </div>
</template>

<script setup lang="ts">
  import { scrollTo } from "@/utils/scroll-to";
  import { computed } from "vue";

  const props = defineProps({
    total: {
      required: true,
      type: Number
    },
    page: {
      type: Number,
      default: 1
    },
    limit: {
      type: Number,
      default: 20
    },
    pageSizes: {
      type: Array,
      default() {
        return [10, 20, 30, 50];
      }
    },
    // 移动端页码按钮的数量端默认值5
    pagerCount: {
      type: Number,
      default: document.body.clientWidth < 992 ? 5 : 7
    },
    layout: {
      type: String,
      default: "total, sizes, prev, pager, next, jumper"
    },
    background: {
      type: Boolean,
      default: true
    },
    autoScroll: {
      type: Boolean,
      default: true
    },
    hidden: {
      type: Boolean,
      default: false
    }
  });

  const emit = defineEmits(["update:page", "update:limit", "pagination"]);
  const currentPage = computed({
    get() {
      return props.page;
    },
    set(val) {
      emit("update:page", val);
    }
  });
  const pageSize = computed({
    get() {
      return props.limit;
    },
    set(val) {
      emit("update:limit", val);
    }
  });
  function handleSizeChange(val: number) {
    if (currentPage.value * val > props.total) {
      currentPage.value = 1;
    }
    emit("pagination", { page: currentPage.value, limit: val });
    if (props.autoScroll) {
      scrollTo(0, 800);
    }
  }
  function handleCurrentChange(val: number) {
    emit("pagination", { page: val, limit: pageSize.value });
    if (props.autoScroll) {
      scrollTo(0, 800);
    }
  }
</script>

<style scoped>
  .pagination-container {
    background: #fff;
    padding: 32px 16px;
  }

  .pagination-container.hidden {
    display: none;
  }
</style>
